A deep-sea worm uses toxins as armor.

A deep-sea worm uses toxins as armor. In blazing hydrothermal vents, Paralvinella hessleri transforms lethal arsenic into armor. “Inside this deep-sea chemistry lab, the two poisons lock together into solid orpiment (As₂S₃) crystals, transforming them from lethal threats into inert, glittering deposits.” ~ learn more